Reply by JayT

The other patent date is on the iron itself, right below the Rule and Level Co design. It is very faint but seems to be from April of 1910.

The knurled brass knob is blank on the inside. I will have to measure the size and have you guys tell me if it is the big or small one. The lateral adjuster says Stanley on it with no dates. There is a frog adjustment screw.

- bbasiaga

The depth adjuster knob in the pics is the small one. A type 11 could have had one of two logos on the iron, either the arched Rule & Level, which sounds like what you might have. (This one is my favorite of all the Stanley logos, BTW)

or the V logo

The arched logos are on the earlier production type 11’s and the V logo on the later ones.